Thanks to dealer Don Tocher,  I have an addition to my Clinton County collection:  a cover from the "Head Quarters 32d Regiment" of the New York State Militia.  in the 1851 - 1855 era.  Until 1995 Plattsburgh had been a major military base since before the War of 1812.

In addition to the ornate corner card, there is a Paid 3 in arc cancel.  This is unlisted in the American Stampless Cover Catalog (1997).